Control Structure In Flux With Motor Feedback; Local (Hand On) And Remote (Auto On) Control - Danfoss FC 300 Design Manual

3 Introduction to AutomationDrive FC 300

3.2.6 Control Structure in Flux with Motor Feedback

Control structure in Flux with motor feedback configuration (only available in AutomationDrive FC 302):
3
In the shown configuration, par. 1-01
loop [1]".
The motor control in this configuration relies on a feedback signal from an encoder mounted directly on the motor (set in par. 1-02
Source ).
Select "Speed closed-loop [1]" in par. 1-00
parameters are located in par. group 7-0*.
Select "Torque [2]" in par. 1-00
the Flux with motor feedback
It requires no torque feedback, since the actual torque is calculated on the basis of the current measurement of the adjustable frequency drive.
Select "Process [3]" in par. 1-00
controlled application.
3.2.7 Internal Current Control in VVC
The adjustable frequency drive features an integral current limit control which is activated when the motor current, and thus the torque, is higher than
the torque limits set in par. 4-16
When the adjustable frequency drive is at the current limit during motor operation or regenerative operation, the adjustable frequency drive will try to
get below the preset torque limits as quickly as possible without losing control of the motor.

3.2.8 Local (Hand On) and Remote (Auto On) Control

The adjustable frequency drive can be operated manually via the local control panel (LCP) or remotely via analog and digital inputs and serial bus.
If allowed in par. 0-40 [Hand on] Key on LCP
to start and stop the adjustable frequency drive via the LCP using the [Hand ON] and [Off] keys. Alarms can be reset via the [RESET] key. After pressing
the [Hand ON] key, the adjustable frequency drive goes into hand mode and follows (as default) the local reference that can be set using arrow key on
the LCP.
3-8
Motor Control Principle is set to "Flux w motor feedb [3]" and par. 1-00
Configuration Mode
to use the resulting reference as an input for the Speed PID control. The Speed PID control
Configuration Mode
to use the resulting reference directly as a torque reference. Torque control can only be selected in
(par. 1-01 Motor Control Principle ) configuration. When this mode has been selected, the reference will use the Nm unit.
Configuration Mode
to use the process PID control for closed-loop control of, e.g., speed or a process variable in the
plus
Torque Limit Motor Mode
, par. 4-17
, par. 0-41 [Off] Key on LCP
MG.33.BC.22 - VLT
Mode
Torque Limit Generator Mode
and par. 4-18
, par. 0-42 [Auto on] Key on LCP
® is a registered Danfoss trademark
FC 300 Design Guide
Configuration Mode is set to "Speed closed-
Flux Motor Feedback
Current Limit
.
, and par. 0-43 [Reset] Key on LCP , it is possible